Boutique runs at 24 Bit/44.1 kHz
AIRA at 32 Bit/96 kHz, you can hear the difference.

Reason was: THE STANDARD SAMPLING RATE FOR THE AIRA SERIES IS 96 KHZ, BUT FOR THE ROLAND BOUTIQUE SERIES IT’S 44.1 KHZ.

Tojo:Yes. AIRA uses 96 kHz, as it places priority on sound quality. But we’ve received feedback from some users that that has made them difficult to use in some situations. We wanted the Roland Boutique series to be something that a lot of people will be able to enjoy, so we went for the standard 44.1 kHz.